45331

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= n/2.at n=24A047168
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-1)/2.at n=24A047179
• Numbers k such that 1000k+1, 1000k+3, 1000k+7, 1000k+9 are all primes.at n=20A064962
• Number of length n+4 0..6 arrays with every five consecutive terms having four times some element equal to the sum of the remaining four.at n=13A249654